* {
    margin: 0;
    padding: 0;
}
.view_bg_default {
    width: 100%;
    height: 100vh;
    background: #b0c870;
}
 
.page {
    width: 100%;
    height: 100vh;
    background: #b0c870;
}

.margin10 {
    margin-top: 10px;
}

.margin20 {
    margin-top: 20px;
}

.margin30 {
    margin-top: 30px;
}